You are saying the CG is in a circle, but from what I understand from your picture and NC's post relating to it, it looks like it's in the oval?

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After talking to NC via PM's it turns out that he is not in that oval but in the little circle. So actually he has been flying with a more forward CG than I have been, even with mine being well forward of the instructions location. So when he says that his is flying fine at the proper CG location he actually never flew it there so of course never had the problems I had when I flew it there.. And when I did my first flights with it at the instructions location 70mm from the LE at fuselage when viewed from above which come out to be at that panel line it's about unflyable...

After talking to NC via PM's it turns out that he is not in that oval but in the little circle. So actually he has been flying with a more forward CG than I have been, even with mine being well forward of the instructions location. So when he says that his is flying fine at the proper CG location he actually never flew it there so of course never had the problems I had when I flew it there.. And when I did my first flights with it at the instructions location 70mm from the LE at fuselage when viewed from above which come out to be at that panel line it's about unflyable...

Okay. Didn't realize there was an un-posted discussion. So the little circle we're talking about, using your photo as an example, is the one about even with the two red dots along the wing root? And the sweet spot is in the center of that circle, which measures approximately 68mm from the front of the wing assembly?

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Images

Okay. Didn't realize there was an un-posted discussion. So the little circle we're talking about, using your photo as an example, is the one about even with the two red dots along the wing root? And the sweet spot is in the center of that circle, which measures approximately 68mm from the front of the wing assembly?

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Yes those red dots are where I have been flying it with the 300's if I remember right.. I'm going flying now I'll check what happens..

According to my little ruler here that is 70mm back from the front of the wing assembly where it joins the fuselage.

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BUT not where it should be if you read the instructions.. You are NOT to measure from there.. While it makes more sense to measure for there you are told NOT to.. You are told to measure from where the leading edge of the wing meets the fuselage when viewed from above as per the picture in the instructions. Which makes it on the panel line.

When you just spent $145.00 for a new plane you do tend to follow the instructions thinking that they are correct, and written for a reason.. Which is why from flight one I have been warning that the instruction have the CG to far back,, But NC has been saying wrongly that no they are right and his flies fine there.. When actually it turns out his is even more forward than mine and why his was flying better..

Video of maiden flight of my #2 Sabre might be up in a while,, I haven't looked at it yet..

Glad to see you got it sorted out. So, where did your CG/balance end up being on F-86 Sabre ver. II?

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Just a hair forward of the back edge of the little circle. Or right at the 70mm mark if you measured from the front of the wing at the fuselage on the bottom. Or at 63mm if you are measuring as told to do in the instructions. This was with the new 250mAh battery it comes with placed all the way forward...